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从零开始学Python:创建第一个Python程序

  • 2026-02-24 23:17:14
从零开始学Python:创建第一个Python程序

学习笔记 DAY 18

坚持是一件说起来容易，做起来不容易的事情。

第一个Python程序

目 录
1. 创建项目2. hello world

1.创建项目

运行Pycharm，选择“新建项目”来创建一个新的项目。新建项目时，需指定项目的路径并创建运行项目的“虚拟环境”，如下图所示。

2.hello world

按行业惯例，学习任何一门编程语言写的第一个程序都是输出hello，world，因为这段代码是伟大的丹尼斯·里奇（C语言之父和肯·汤普森一起开发了Unix操作系统）和布莱恩·柯尼汉（awk语言的发明者）在他们的不朽著作The C Programming language中写的第一段代码。

print（'hello,world'）

（从基础背景开始学起，坚持，是一件不容易的事情。）

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  137. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
  138. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
  139. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/runtime/temp/067d451b9a0c665040f3f1bdd3293d68.php ( 11.98 KB )
  140. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000591s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000547s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000270s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000276s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000449s ]
  6. SELECT * FROM `set` [ RunTime:0.000197s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001898s ]
  8. SELECT * FROM `article` WHERE `id` = 475356 LIMIT 1 [ RunTime:0.001992s ]
  9. UPDATE `article` SET `lasttime` = 1772312958 WHERE `id` = 475356 [ RunTime:0.002867s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000718s ]
  11. SELECT * FROM `article` WHERE `id` < 475356 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001127s ]
  12. SELECT * FROM `article` WHERE `id` > 475356 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002098s ]
  13. SELECT * FROM `article` WHERE `id` < 475356 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003849s ]
  14. SELECT * FROM `article` WHERE `id` < 475356 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003318s ]
  15. SELECT * FROM `article` WHERE `id` < 475356 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006207s ]
0.172710s